Section 5
Troubleshooting
Baldor Series 22H Controls require very little maintenance and should provide years of trouble free operation when installed and applied correctly. Occasional visual inspection should be considered to ensure tight wiring connections and to avoid the build up of any dust, dirt, or foreign debris which can reduce heat dissipation. The control should be mounted in a location that protects the internal circuits and external wiring from moisture or liquid contaminants.
When a fault condition occurs, motor operation stops and the fault is displayed on the Keypad Display. If a REGEN FLT is displayed, this indicates a fault in the converter section of the control. To determine the specific converter section fault, the keypad must be moved to the Converter Control Board keypad connector. The fault log can be examined and the specific faults will help to further isolate the failure. A list of possible Converter Control Board Fault Messages is given in Table
When a fault has been identified, all input power must be removed from the control to avoid the possibility of electrical shock. The servicing of this equipment should be handled by a qualified electrical service technician experienced in the area of high power electronics.
It is important to familiarize yourself with the following information before attempting any troubleshooting or service of the control. Most troubleshooting can be performed using only a digital voltmeter having an input impedance exceeding 1 megOhm. In some cases, an oscilloscope with 5 MHZ minimum bandwidth may be useful. Before consulting the factory, check that all power and control wiring is correct and installed per the recommendations given in this manual.
No Keypad Display - Display Contrast Adjustment
If there is no visible display, use the following procedure to adjust the contrast of the display.
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Apply Power | No visible display. |
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Press DISP key | Puts control in Display mode. |
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| Display mode with nothing visible. |
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Press SHIFT key 2 times | Accesses display contrast |
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| adjustment. |
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Press Y or B key | Adjusts display contrast |
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| (intensity). |
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Press ENTER key | Saves display contrast |
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| adjustment level and exits to |
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| display mode. |
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When a Fault is Displayed When a fault is displayed, press “DISP” so that you can view the menu items (to go to Diagnostic or Fault Log menus etc.). When you exit these menus, the fault message will again be displayed. The control must be reset to clear the fault message from the display.
MN722 | Troubleshooting |
